Lighting fixture with adjustable lens module

Abstract

A lighting fixture includes a main housing, an illuminating module including a plurality of illuminating units, and an adjustable lens module. The adjustable lens module is detachably mounted in the main housing at a position corresponding to the illuminating module. The adjustable lens module includes at least one lens element which is in optical communication with the illuminating units. At least one of the illuminating module and the adjustable lens module are arranged to adjustably move with respect to each other so as to alter a planar relative position between the illuminating module and the adjustable lens module for adjusting a light type coming out from the lens element with respect to the illuminating units to achieve at least two light types of the lighting fixture.

What is claimed is: 
     
       1. A lighting fixture, comprising:
 a main housing having a receiving cavity; 
 an illuminating module mounted in the receiving cavity, the illuminating module comprising a plurality of illuminating units for generating illumination, and a main control board, wherein the illuminating units are mounted on the main control board, each of the illuminating units being configured as a LED arranged to generate light; 
 an adjustable lens module detachably mounted in the receiving cavity of the main housing at a position corresponding to the illuminating module, the adjustable lens module comprising at least one lens element which is in optical communication with the illuminating units, at least one of the illuminating module and the adjustable lens module being arranged to adjustably move with respect to each other so as to alter a planar relative position between the illuminating module and the adjustable lens module for adjusting a light type coming out from the lens element with respect to the illuminating units to achieve at least two light types of the lighting fixture, the adjustable lens module further comprising a peripheral frame supporting the lens elements, and further having a predetermined outer contour to provide optical alteration to the light generated from the illuminating units, each of the lens element having at least one of a convex portion and a reflective portion arranged in a predetermined contour for altering an angle of propagation of light passing through the corresponding lens element; and 
 a plurality of securing slots spacedly provided on the main control board of the illuminating module, a plurality of retention slots spacedly provided on the peripheral frame of the adjustable lens module, and further comprising at least one positioning pin arranged to be selectively attached between one of the securing slot and the corresponding retention slot for selectively and adjustably connecting the illuminating module to the adjustable lens module. 
 
     
     
       2. The lighting fixture, as recited in  claim 1 , wherein a distance between each two adjacent retention slots is smaller than that of the securing slots. 
     
     
       3. The lighting fixture, as recited in  claim 2 , wherein the adjustable lens module further has a plurality of light type markings formed on at least one of the adjustable lens module, the main housing and the illuminating module for signifying the light types offered by the adjustable lens module, and for allowing a user to correctly position the adjustable lens module on the illuminating module. 
     
     
       4. The lighting fixture, as recited in  claim 3 , wherein the lens element has both the convex portion and the reflective portion arranged in a side-by-side configuration, the reflective portion being arranged to reflect light beam coming from the corresponding illuminating unit at a predetermined direction, the convex portion being arranged to deflect light beam coming from the corresponding illuminating unit. 
     
     
       5. The lighting fixture, as recited in  claim 4 , wherein the positioning pin is arranged to selectively extend between a retention slot and a corresponding securing slot to selectively adjust a relative position between the adjustable lens module and the illuminating module so as to allow the light beam from the illuminating unit to pass through the lens element to have one of a plurality of predetermined polarization angles.